1: all the pipes leading to my house are out of my control and will be sending the same temperature and purity of water regardless of what temperature I set the tap to? The water goes into my house, to the hot water heater, to the tap. Or just into my house to the tap. Either way whatever is outside of that is outside of my control and the hot water heater can’t cause the water to retroactively absorb lead from pipes outside of my house.
And as for your second point. Running the kettle from cold takes like 4-5mins. Running the hot water to max temp takes 30 secs. Running the kettle with max temp water takes 1:30-2 mins. That’s still like a 50% time savings, for a 500ml load. I haven’t tried with larger amounts than that because I don’t need more than that, but I assume that the greater the volume of water, the more time it would take from cold.
1: all the pipes leading to my house are out of my control and will be sending the same temperature and purity of water regardless of what temperature I set the tap to? The water goes into my house, to the hot water heater, to the tap. Or just into my house to the tap. Either way whatever is outside of that is outside of my control and the hot water heater can’t cause the water to retroactively absorb lead from pipes outside of my house.
And as for your second point. Running the kettle from cold takes like 4-5mins. Running the hot water to max temp takes 30 secs. Running the kettle with max temp water takes 1:30-2 mins. That’s still like a 50% time savings, for a 500ml load. I haven’t tried with larger amounts than that because I don’t need more than that, but I assume that the greater the volume of water, the more time it would take from cold.